Olduvai Hominid number 9 (OH 9) is a fossilized skull cap of an early hominin, found in Olduvai Gorge by Louis Leakey in 1960. It is believed to be around 1.4 to 1.5 myo. It is the first hominin that has a brain size larger than 1000 cc.
For more information, click here. Or, Try these sources:
- The Smithsonian Institution's Human Origins Program. Can be read here.
- eFossils Resources. Can be read here.
- Britannica. Can be read here.